Pulley for cable railways



(No Model.)

" E. D. DOUGI-IERTY.

PULLEY FOR CABLE RAILWAYS.

N0. 364,498. PatentedJune 7, 1887.

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Hfilllllllllllllll UNITED STATES PATENT OFFICE.

EDYVARD D. DOUGHERTY, OF PHILADELPHIA, PENNSYLVANIA.

PULLEY FOR CABLE RAILWAYS.

srncrrrcnrron forming part a Letters Patent No. 364,498, dated June '1,1887.

Application filed August 521, 1886. Serial No. 211,564. (No model.)

To aZZ whom it may concern.-

Be it known that I, EDWARD D. DOUGH- ERTY, of Philadelphia, in thecounty of Philadelphia and State of Pennsylvania, have invented certainnew and useful Improvements in Pulleys for Cable Railways; and I dohereby declare the following to be a full, clear, and exact description.of the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

My invention relates to an improvement in pulleys for cable railways,and more particularly such pulleys as are employed in turning curves,the object of my invention being to produce a pulley which shall becapable of lasting longer under wear than those heretofore provided forthis class of wear, and one which shall be readily removed when unfitfor wear, and replaced in proper condition for effective service.

To the above purpose my invention consists in the eombination,with apulley having a pair of recesses contiguous to and opening out upon eachof its marginal edges, of a pair of wearing-rings fittingiinto saidrecesses, as hereinafter described and claimed.

My invention further consists in certain pe culiar and novel features ofconstruction and arrangement, as hereinafter described and Figure l is aface elevation of a pulley con structed in accordance with my invention.Fig. 2 is a central transverse section of the same. Fig. 3 is across-section of a tractionrailway bed with my improvements applied.

In traction-railways in which the tractioncableis guided around curvesby pulleys lo cated within the trough and placedin pairs at right anglesto each other each pulley in the trough or tunnel is worn at one edge ofits circumference only. Thus such pulleys become rapidly unfit for useand have to be constantly replaced. As will be seen from the ensuingdescription, I avoid this defect and produce a pulley which will notonly last much longer than the pulleys heretofore employed in this classof railways, but one which may be caused to double its increasedusefulness by being reversed in position, and which may be also readilyrefitted for further use.

In the said drawings, A designates one oi. a number of pulleys which aredesigned for use on the curved portions of traction-railways, as shownin Fig. 3. This pulley is formed with an annular boss, A, encircling thecenter of the pulley at its circumference, as shown. B B designate apair of metallic wearing-rings which embrace the periphery A at eachside of the central boss, A, of said pulley, and A designates a numberof screws which securethe wearing-rings to the boss in such manner as tomaintain their position upon the periphery of the pulley. These screwseach extend through semicircular recesses a in the periphery of thepulley and similar recesses in the inner surface of each ring 13, andthe inner ends only of said screws are threaded to enterinternallythreaded sockets a, which are formed in the sides of the bossA. Thus it will be seen that the ringsB may be readily attached to andremoved from the peripheries of the pulleys. It will also be seen byreferring to Fig. 3 that the wear of the cables'O 0 comes only on themeeting edges of the pulleys A, and that said pulleys may be readilyreversed to present thei r opposite edges to each other, therebydoubling the length of wear of the pulleys.

When both wearing-rings of each pair of pulleys have become worn out,such pulleys are to be removed and new wearing-rings substituted for theold ones, after which the pulleys are to be replaced in operativeposition.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. An improved pulley for the cables of traction-railways, havingmetallic, wearing rings secured upon its periphery at the oppositemargins thereof, substantially as de scribed.

2. An improved pulley for cable railways, having a central boss and ametallic wearing ring-removably secured upon one side of said bosscontiguous to the edge of the periphery of the pulley, substantially asset forth.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

EDWARD D. DOUGHERT r.

Witnesses:

ROBERT N. Snurnns, J. McGREooR GIBB.

